Please follow this diagnostic troubleshooting procedure:
1. Download and run the MGA Diagnostic Tool: http://go.microsoft.com/fwlink/?linkid=52012
2. After running the MGA Diagnostic Tool, click
on the "Windows" tab and then click on "Copy".
3. Next, visit the following website and create a post in the
"WGA Validation Problems" forum and paste the
results of the WGA Diagnostic Data in a detailed post.
http://forums.microsoft.com/Genuine/default.aspx?SiteID=25
4. A WGA troubleshooting specialist will analyze the data and
recommend an appropriate solution.